Ontario courts have been hit by a cyberattack that may have exposed personal information of people involved in the court system.
Chief Justice of Ontario Michael H. Tulloch, along with Chief Justice of the Ontario Supreme Court Patrick J. Boucher and Chief Justice of Ontario Sharon M. Nicklas, shared a statement on September 2 about the cyberattack that was observed CBC News.
According to the statement, the breach affected C-Track, an online case management platform owned by Thomson Reuters Canada. The company detected “unauthorized activity in one of its cloud environments” on June 30, 2026, but later determined that the breach began in March. Thomson Reuters took steps to curb this activity, engaging cybersecurity experts to investigate and notifying law enforcement authorities.
In addition, Thomson Reuters has created a special information website detailing the hack, noting that “certain confidential, redacted or sealed information may have been affected for some affected vessels.”
While names and other personal information were potentially accessed, it is unclear what type of information or records were disclosed. It’s also unclear how long ago the records go back. Moreover, Thomson Reuters was unable to provide an estimate of how many Ontarians could be affected.
Thomson Reuters says it has implemented additional cybersecurity measures to protect C-Track systems and data. The company told CBC News that its “products and services remain fully functional and safe for continued use.”
Notably, Ontario is not the only location affected. The C-Track breach also affected court systems in the US, including Alabama, Kentucky, Ohio, Montana, Nevada, North Dakota, New Hampshire, South Carolina, Tennessee, Wyoming and the US Virgin Islands.
In a statement, the New Hampshire judiciary said the breach affected records from 2002 to 2015, although it is unclear whether the Ontario records cover a similar time period.
Source: Ontario Courts Via: CBC News
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